Climate, seasons and weather National parks of the American West
Because of the except when the chinook blows, a hot and dry wind.
Summers everywhere are hot and often stormy.
In California, in recent years, drought has become a real scourge. Monstrous fires have destroyed tens of thousands of hectares of forest, especially near Yosemite National Park, in the Napa and Sonoma region, as well as in Mendocino.
- More info on the climate in California and when to go to California
In Arizona (Phoenix), Mexico (Santa is more likely in the fall or in the spring if you have the choice: indeed, certain sectors are transformed into furnaces and signs invite not to walk there between 10h and 17h.
You should always wear sunglasses and a hat to avoid sunstroke. It's not just a precaution, it's a necessity!
On the other hand, in winter, take a large fleece, or even a down jacket, because the tempyou near Visitor Centers in particular, to make sure that the access roads are not closed.
Tempemai and early June.